半腔靶M带X射线角分布测量与模拟

Angular distribution measurement and simulation of M band X-ray from the half-hohlraum

在"神光Ⅱ"实验条件下,通过在半腔靶底部的漏口来测量内爆靶丸附近的M带X射线发射的角分布.介绍了试验中采用的诊断方法和试验方法,并给出了典型的实验结果.此外,利用视角因子程序,对该实验的X射线角分布进行了模拟.经过对比,发现实验结果与视角因子程序模拟结果相符,从半腔靶底部漏口出射的M带X射线不遵从cosθ分布.实验结果和模拟结果的比较有助于提高对黑腔物理图像的理解,并为内爆实验设计提供实验依据.

Measurement of radiation field near a implosion pellet M band X-ray is a import ant area in ICF research. On the SG Ⅱ laser facility, M band X-ray from Au pla sma was measured in half-hohlraum radiation from the end. The experimental set-up and typical result were given. And we’ve also used the view-factor program to simulate this experiment. The results indicate that angular distribution of M band X-ray from the end of half-hohlraum doesn’t assume linear relationship with the cosine of eradiating angle. The results are useful for the research of implosion experiment and target design.